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Modality shares its root with the word mode, meaning the way in which something happens or is experienced. A sensory modality is a way of sensing, like vision or hearing. Modality in someone's voice gives a sense of the person's mood. In logic, modality has to do with whether a proposition is necessary, possible, or impossible.
is a Modal: cf. [...] (music) of, relating to, or composed in the musical modi by which an octave is divided, associated with emotional moods in Ancient â and in medieval ecclesiastical music. (logic) of, or relating to the modality between propositions.